Founding of San Andrés de Arroyo Historical milestone · Santibáñez de Ecla, La Ojeda, Palencia Countess Mencía López de Haro, daughter of the Lord of Biscay, founded the monastery in 1181 and brought it into the Cistercian order; its abbess came to exercise civil and criminal jurisdiction over the surrounding villages. 1181 Photo: Marlene VD (CC BY-SA 3.0 es) What to see and do in Santibáñez de Ecla